Automatically extensible and collapsible tray



ing thespeoificationj Patented Nov. 22,- 1 93 2 F emm. STAT HENRYnoosyor CINCINNATI, oHIo f YADJUSTA'BLE-SIIIOREV Application filedMarchllfi,

This invention relates to apparatus for forming, concrete floor molds,and particularly to temporary supportssor shores on which the moldsaresupported. I g It is frequently desirable to construot one portion of afloor of a thicker slab of concrete than another portion where thethickportion i is" required. to carry a heavier load than the otherpart. The forms for the mold forthe thick slab are assembled in a lowerplane than those for, the thin-slab, with a substantially vertical wallbetween thein the idifierencexin thickness between the two slabs beingvaried according tothe difierenoe in the; loads to be carried thereon. rl 1 The principal object of this invention is the provision of;a shorewhich isisiinple in construction, efficient in use, and adapted tosupport thefloor forms on oneside ata higher. level than those on theother side. f i Another object ofthe, invention is the pro: vision'of ashore ofthis kind adaptedto su port the floor forms on onefside in ahigher plane than thoseon-the other side, said shore being adjustable tovary the-verticahdistance' between saidplanes. f I

Still another obj eot :of

V the invention sag provision of a shoreadapted to support a pluralityof floor forms at their; corners,fsaid,

form's others. v l v i V. q

f Tothese and other'ends, the invention'oonjsists in the constructionarrangement of parts that will appearffro n'the following descriptionwhen read in conjunetion with the accompanying drawings, the novel fea-ltures beingpointed'outin the claims followa different horizontal: planethan the In the drawings:- 4 y i Fig. 1 is afmgmentar plan view ofafloor mold illustrating 'one embodiment "of the invention; a

Fig.2 is a fragmentary, vertical seotionlof thesame, taken substantiallyon line2 2 of arrows at said line."

shore being adjustable to support one of said 1 p r p ,1 aresubstantiallyrectangular 'pr squareT-in f form, and-arebutaway aetheicorners to fit r 1930; (Serial no 435,450; a Fig 1 and looking i arrowsat saldline s Fig. 3 isase'otion on line line and. showing one of thefloor forins "de taehed; I

i Fig. 4 is-a si F ig. 5 isan elevation of the other side of the shoreshown in'Fig fi-; i

- 5 Fig." 6'' is a i perspective viewjof an "ad able earriershown in FigQ ljl I (F g.7 is aperspective viewo-f another sh'o e shown in Y IFig.8 is apl'an view of the-same; "Fig, 9 isa perspective view; of-a;carrier shown in Fig. '8- 7 i looking in the directionofthearrowat'sai' i Fig. 10 isa frontelevation of I modified form oftlie'shore shown in Fig'f l-i 1 I Figffl'l is asideeleva'tionofthefs'aniejgf,

Fig. 12 is a plan View of theS ll m howing v a'fragnientof a-filoorforrnsupportedthereon and another detaehed therefrom, and

- Fig; 13 is a sectiontaken ion line, 12;-:12of

Fig. ll and looking inthe dire'c'ti n of the Referring specifically I tothe drawi 'n which-like refereiioe numerals; refer 5? sameppartsjinthef'seveifalviews, 1 represents r 5 '7 a filolor' iformofw'ellknowntype: The forms aroundthetop's of shores 2,3 and konfwhichthey are supported to forma floor moldl if In' the embodimei tillustrated, the-forms! 1 are assenibled in a lower'plane 'than thefforms 1'. for the purpose of forming-a thick-' sh'own supportedlon eachof tl eshores 2f3 i i and 4, those supported on the shores 2 ,;all b-fing in the same plane,' while two of those supgl portedon the shorearegsupported at a: lower plane than the otheritwo, and onefot n'theidirection I 1 Nov. 22, 1932. K 5, S A MAN v 1,888,740

AUTOMATICALLY EXTENSIBLE AND GOLLAPSIBLE TRAY Filed Jan. 7, 1931 2Sheets-Sheet Patented Nov. 22, 1932 UNITED STATES PATENT oFFicEf i KARI.osrnnsonauivmn, or

HAMPTON wick, NGL ND AUTOMATICALLY nx'rnnsinrinnnn COLLAPSIBiE TRAYS f rApplication filed January 7, 1931, Serial No. 507,204, and in GreatBritain September 15, 1930.

' ing and pivoting the latter and the means for keeping the same eitherin the folded or in the partly or fully extended positions, ready forusein either. An example of a simple way of carrying out the inventionisdescribed and illustrated in the annexed drawings of which Fig. 1 is aperspective view of the tray, Fig. 2 is a perspective view of the trayextended, i g Fig. 3 is an underplan of table folded, Fig. 4 is asection on line 4 4.of Fig. 3, Fig. 5 is a section similar to 4 with thelegs beginning to descend, Fig. 6 is a section of tray and table-fullyopened. r

The tray-top a is bordered by downwardly depending rimsaflthus providinga h0l-' low space on the underside of the tray. Arranged at each. cornerof the tray and with- 33 in the rim a are metal or like brackets b whichare spaced away from the rim a as shown in Fig. 3 and are provided withkeyhole slots 6 (see Fig. 4.) Arranged transversely across the ends ofthe tray are pivot 35 spindles a the ends of which are located in theslots b suitable rollers or the like 0 being provided. The spindles acarry at or near their centers hand-loops 0 and the rim A a of the trayis cut away at its ends as at a in order that the hands may be readilyplaced under the trayto grip the handloops 0 By means of the hand loops0 the spindles 0 can be caused to recede from one another along theslots 5 against the action of tension springs 72. which are arranged onealong each long side of the tray and which are secured at their ends tothe ends of the spindles 0 (see Fig. 4). The centerpoints Kg of thetension springs h are secured as at is to the sides of the tray.

a length of wire Z which is secured at itslower ferred to.

arms QZ- to pass finally J nderneath and be- Freely pivoted totheends'of thespindles c are cranked arms d secured to the ends of tubes 03which form the upper parts ofthe legs whenthe tray is converted into atable. The cranked arms al are of the shape shown clearly in Fig. 6,.fora purpose hereinafter described. g

The' tubes cl are telescopically arranged within further tubes 5 whichare pivotedas atc at their upper ends to the down-turned ends ofbrackets f mounted along the sides of an-iundershelf g. Means areprovided to prevent the complete withdrawal of the tubes d from thetubes e,.said means comprising end to a pin 6 near the lower end of thetube 6' and at its upper end is provided with a head Z2 arranged withinthe tube d, this head l in conjunction with the inturnedend d of thetubed serving the purposeabove re- The parts of the device are arrangedand operated in the following manner: as a tray, the undershelf g isaccommodated in the hollow recess on the underside of the tray top a andin close proximityto the same (see Fig. 4 which showsthe device in, useas a tray) The tubes 03 are telescoped within. the tubes 6 and the tubes6 are arranged horizontally underthe shelf 9. I It will be seen that '80in this position the connection between the cranked arms al and thespindles 0 are,ar-.

ranged inside the pivot connections e of the tubes e to the brackets V fcarriedby .the' shelf. The pull of the springs It therefore serves tokeep the collapsed legs d, e raised and also enables a neat and compacttray to be pro: vided. As 'wil lb'e appreciated on reference to Fig. 3,the two sets of tubes 6 fold up side by ea r desired to convert the trayas yond the pivot point 6 it will also cause the tubes d to beslightlywithdrawn from the,

tubes 6 (see Fig. 5) As soon as the handles have been pulledsufficiently to bring the ends of the arms beyond the pivot points 6 thetubes 6 will commenceto fallaboutthe pivot 0 due to their own weightsincethe springs it no longer maintain the same in the raised position.They will then fall until they reach a substantially vertical position,the cranked arms 03 meanwhile pivotmgon thespindles. 0 and the weight ofthe shelf g I of the tubes (Z together. This drawing to gether' of theupper ends ofthe tubes (Z will cause the legs d and e to slope outwardlyas shown in Fig. '6 whereupon the tray a which now forms the table topwill be firmly supported. The tubes d just above the upper ends of thetubes 6 are arranged to bite into recesses in the brackets f to give agood grip and a firm stand.

individual requirements. i In order-to collapse the'table and to re- 1convert-the same into a tray, 1t is merely nec- Of course by releasingthe hand-loops 0 before the legs 0?, e are fully extended, the

height of the tray a'may be adjusted to suit essar'yto place thehands'under the rim and to pull the hand-loops 0 This it will'beappreciated will cause the'legs to become vertically disposed, when,with the hand-loops c i still pulled apart, the tubes d can betelescoped-into the tubes 0' by pressure onthe tray a. WVhen the tubes(Z havebeen fully telescoped into the tubes 0 so that the shelf g isarranged in close proximity with the un derside of the tray top,the-handles0 may be released when the springs it will act to swing thetubes 6 up under the tray top and to maintain the same in the raisedposition asshown in Fig. 4 and as described above/ It will be understoodthat the return-of the spring-tension at anymome'nt during extending orfolding fixes the parts in the position momentarily attained or in otherwords,-only if the hands are pulling asunder can the furthe:- openingorclosing he proceeded with, which of course permits of the handies'tadjustment imaginable.

' Although the example described mentions i spring-'tensiononly, Imayuse other forms of controlling the action and maintaining the parts intheir desired positions without'devi- I ating 'fI'OmthG invention.

ing transversely across the tray at the under side and near the endsthereof and connected with the tray for in ward and outward movementrelative toeach other, yieldabl'e. means tending constantly to move saidrods relatively inward, a plurality of legs one at each end of each rod,said legs being pivotedat their upper ends to said rods for movementbe-- tween folded positions underlying the tray element and extendedtray element supporting positions, members slidably mounted on saidlegs, and a leg spreader element pivotally connected with said members,whereby the spreader element is movable upwardlyralong the legs to lieclosely adjacent to the tray eleinent when the-legs are folded, anddown? wardly along said legs when the same are exa I tended to hold thelcwereud portionsof the legs againstboth inward and outwardmova men-trelative to-each other. e 1

2. A combined serving tray and table as setforth in claim 1 in whichrthelegs comprise upper and lower telescopic sections and in which thespreaderelement is 'pivotally connected to the upper ends of the lowerleg sections.

' 3. A combined serving tray and table as set forth-in'claim 1 inwhichthe pivotal connections between the legs and the rods are locatedatthefree-ends of angle members which extend first'laterallyfrom the,upper ends of the legs and then downwardly in spaced relation to thelegs to permit the members to which the spreader elementis pivoted tobe.

moved: across the'rods to dispose the pivots 1 between the" spreaderelement 'and'said members above and outwardly relative to the rods whenthe legs are folded, whereby the yieldable connections between the rodsserve. to

'hold. the legs against swinging to extended positions when the legsharefoldedi o KARL SCHAUMAN.

' What I'claim'as-my invention a'nd desireto 1 seeureby Letters Patentis 1. Acombined serving tray and tablecomprising a tray element,a-pairof rods extend-

